## interpretator exl_ --list <full_path_to_exl_list>.exl

- execute string by string <full_path_to_exl_list>.exl 
    - ^# comment string
    - string contane eval {eval local home=${HOME}}
    - execute string as it's
    - if errno after execute string !=(0|2) - return 1
      - errno 0 : success
      - errno 2 : signal inner check process execute string, not error
          - check semaphore may be inner check process 
